Nomenclature
CAS number: 16721-80-5
Sodium sulfhydrate; sodium hydrosulfide; sodium hydrogen sulfide.
HNaS; mol wt 56.06.
H 1.80%, Na 41.01%, S 57.20%.
NaSH.
Description and references
Prepd from sodium ethylate and hydrogen sulfide:
Rule, J. Chem. Soc. 99, 558 (1911); Teichert, Klemm, Z. Anorg. Allg.
Chem. 243, 86 (1939); Eibeck, Inorg. Synth. 7, 128 (1963).
The technical grade may be obtained by reacting sodium bisulfate with
calcium sulfide in the cold or by saturating NaOH solns with H2S.
Properties
Rhombohedric-cubic crystals. White to colorless.
Odor of hydrogen sulfide. Very hygroscopic. Readily hydrolyzed
in moist air to NaOH and Na2S. d 1.79. Turns yellow upon heating in dry air,
changing to orange at higher temps. mp 350° forming a black liquid. Sol in water,
alcohol, ether. Gives a blue-green soln in dimethylformamide.Derivative
Dihydrate.
Properties
Needles or flakes, mp 55°. Completely and rapidly sol in water,
alcohol, ether. Note: The commercial product is usually
the dihydrate. Can be shipped in lacquer-lined steel drums.Derivative
Trihydrate.
Properties
Shiny rhombs, mp 22°.Use
Dehairing hides; desulfurizing viscose rayon; in
the manuf of sulfur-contg dyes and other thio compds such as thioamides,
thiourea, thioglycolic acid, thio- and dithiobenzoic acids, sodium
thiosulfate.